Involuntary muscle spasms/tremors

I have been on PD since October and before that one year on hemo. I absolutely appreciate PD. I feel better and like having some control over my dialysis treatment. The last several months I have been experiencing frequent spasms and they can occur in leg, shoulder, arms, etc. these involuntary muscle tremors were at one point strong enough to cause a fall. I feel the twitching even when I am in bed and they can be any where. I have an appt. with a neurologist the end of the month. Has anyone had these experiences?